Pypes exhaust systems will give you more horsepower, better MPG and a great throaty deep tone. These cross-member back systems are made of 16-gauge 409 stainless steel with a natural finish. All Pypes systems include an X-Pipe for a balanced flow with minimal back pressure thus maximizing HP. The system includes slip-fit tubing, stainless steel hangers and zinc coated clamps. Designed to exit the rear of the vehicle unless noted. These systems are designed to bolt to your headers or down pipe. Includes instructions. Fits 1970-81 GM F-Body, includes Race Pro mufflers. Pypes part number SGF70.Includes X-Pipe for balanced flow,2 Pypes mufflers maximizes HP Follow Pypes' step by step instructions included in box.Pypes exhaust systems will give you more horsepower, better MPG and a great throaty deep tone. These cross-member back systems are made of 16-gauge 409 stainless steel with a natural finish. All Pypes systems include an X-Pipe for a balanced flow with minimal back pressure thus maximizing HP. The system includes slip-fit tubing, stainless steel hangers and zinc coated clamps. Designed to exit the rear of the vehicle unless noted. These systems are designed to bolt to your headers or down pipe. Includes instructions. Fits 1970-81 GM F-Body, includes Race Pro mufflers Follow Pypes' step by step instructions included in box. 12990 Collector Reducer 12994 76-81 Firebird Trans Am Splitter exhaust tips 13494 67-81 F-Body exhaust Tips Follow manufacturers instructions always ma